Page 1
MIL-1225LS
1000BASE-LX to 1000BASE-SX
Single-mode to Multi-mode
Media Converter
PWR1
PWR2
5 VDC
5 VDC
1.5 A
1.5 A
MIL•1225LS
Gigabit Ethernet
1000BASE-LX to 1000BASE-SX
Single-mode to Multi-mode
Media Converter
SMF Port
TX RX TX RX
MMF Port
SC ConnectorSC Connector
Installation Guide
This guide includes the following information:
“
Introduction” on page 2
“Installation” on page 2
“Theory of Operation” on page 3
PWR1
PWR2
SMSD
MMSD
“Indicators” on page 3
“Specifications” on page 4
“Legal” on page 6
Doc #: 90000091 Rev. A
Page 2
Install Guide
About this Manual
This manual covers the MIL- 1225LS gigabit converter. The terms “MIL-1225LS”
and “converter” are used throughout this document to describe the device.
Introduction
The MIL-1225LS is a 1000 Mbps, gigabit Ethernet device that converts short-wave,
multi-mode fiber optic signals to long-wave, single-mode fiber optic signals (and
vice versa). The device has two SC connectors:
Port
•
SM
•
MM Port
(1300 nm single-mode fiber)
(850 nm multi-mode fiber)
The MIL-1225LS is a stand-alone device, and it has dual-redundant power
supplies for better reliability.
Packaging Contents
The MIL-1225LS package contains the following:
• MIL-1225LS multi-mode to single-mode fiber converter
• Power supply adapter (one)
• Installation guide
Features
• Compact form-factor
• Power supply adapter
• Diagnostic LEDs
Installation
1. Connect an SC-type, single-mode cable to the
2. Connect an SC-type, multi-mode cable to the
SMF
MMF
Port on the MIL-1225LS.
Port on the device.
Note:
A hybrid cable is recommend to compensate for the DMD (Differential Mode Delay) issue
associated with gigabit speeds and some multi-mode fibers.
3. Connect a power cable to PWR1 . A second, optional power supply may be
connected to the back-up power jack ( PWR2
4. Supply power to the converter and make sure the PWR1 (and PWR2 if
applicable) LED(s) illuminates.
Model: MIL-1225LS Media Converter 2
) to offer redundant power.
Page 3
Install Guide
5. Check the
SMSD LED and the
MMSD LED for proper status. This depends on the
status of the devices connected to the unit. They indicate a signal is being
received on those ports.
Contact Digi’s technical support if you experience difficulties installing the MIL1225LS.
Theory of Operation
The MIL-1225LS is a single-mode to multi-mode fiber converter for gigabit
Ethernet networks. When the device receives an optical input signal from one
port, it will convert it into an electrical signal. The device will then convert the
electrical signal back to an optical signal suitable for transmission over the other
port.
PWR1
PWR2
5 VDC
5 VDC
1.5 A
1.5 A
MIL•1225LS
Gigabit Ethernet
1000BASE-LX to 1000BASE-SX
Single-mode to Multi-mode
Media Converter
SMF Port
TX RX TX RX
PWR1
PWR2
SMSD
MMSD
MMF Port
Single-mode
device
Multi-mode
device
Figure 1.MIL-1225LS Connections
Indicators
There are 4 LED indicators on the MIL-1225LS:
• PWR1 (Power One): This LED illuminates when the MIL-1225LS is receiving
power on the primary power adapter.
• PWR2
(Power Two): This LED illuminates when the MIL-1225LS is receiving
power on the (optional) back-up power adapter.
• SMSD
(Single-Mode Signal Detect): This LED illuminates when MIL-1225LS
receives a valid link or data traffic signal from the device connected to the SMF
Port
•
MMSD (Multi-Mode Signal Detect): This LED illuminates when MIL-1225LS
receives a valid link or data traffic signal from the device connected to the MMF
Port
Model: MIL-1225LS Media Converter 3
Page 4
Install Guide
Specifications
Power Supply
External power is required for the MIL-1225LS. The system draws 700 mA at
normal operation in room temperature of 25° C.
• A 110 VAC wall mount power supply adapter for North American use
• A 220 VAC power supply with IEC receptacle converting to 5 V DC 1.5 Amp
for international use (according to the country where the unit will operate in)
Storage Temperature
• Minimum: -25° C
• Maximum: 75° C
Operating Conditions
Table 1: Recommended Operation Conditions
Parameters Minimum Maximum
Operating Temperature +5° C 40° C
Humidity: non-condensing 10% 95%
Signal Output Load 35 ohm 75 ohm
Supply Voltage 4.75 V 5.25 V
Specification for Single-Mode (SM) Port
• Connector type: SC
• Wavelength: 1270-1355 nm
• Cable specification: 8/125
µ m in
3 km cable
• Min. optical power output: -13.0 dBm
• Max. optical power output: -3.0 dBm
• Receive optical: Min. Max.
sensitivity -3 -20
• Return loss -12 dB
• Supports up to 3 km of single-mode cable
Model: MIL-1225LS Media Converter 4
Page 5
Install Guide
Specification for Multi-Mode (MM) Port
• Connector type: SC
• Wavelength: 830-860 nm
• Cable specification: 50/125
µ m with
550 m links and
62.5/125 µ
m in
300 m links
• Min. optical power output: -10.0 dBm
• Max. optical power output: -4.0 dBm
• Transmitter jitter 195 ps
• Receive optic characteristics: typ. max.
Sensitivity/input optic. power min.-18.5 -17
Maximum input optical power 0 0
Return loss -12 dB
Receiver jitter 300 ps
• Supports up to 550 m of multi-mode cable
SC-type Connector
Figure 2. SC-type Connector (Rear View)
Model: MIL-1225LS Media Converter 5
Page 6
Legal
Regulatory Approvals
• FCC Class A
• UL 1950
• CSA 22 No. 950
• EN60950
• CE
– EN55022 Class B
– EN50082-1
Canadian EMI Notice
This Class A digital apparatus meets all the requirements of the Canadian Interference-Causing
Equipment Regulations.
Cet appareil numérique de la classe A respecte toutes les exigences du Règlement sur le matériel
brouilleur du Canada.
European Notice
Products with the CE Marking comply with both the EMC Directive (89/336/EEC) and the Low Voltage
Directive (73/23/EEC) issued by the commission of the European Community. Compliance with these
directives implies conformity to the following European Norms:
• EN55022 (CISPR 22) - Radio Frequency Interference
• EN50082-1 (IEC801-2, IEC801-3, IEC801-4) - Electromagnetic Immunity
• EN60950 (IEC950) - Product Safety
Digi International warrants to the original consumer or purchaser that each of its
products, and all components thereof, will be free from defects in material and/or
workmanship for a period of five years from the original factory shipment date. Any
warranty hereunder is extended to the original consumer or purchaser and is not
assignable.
Digi makes no express or implied warranties including, but not limited to, any implied
warranty of merchantability or fitness for a particular purpose, except as expressly set
forth in this warranty. In no event shall Digi be liable for incidental or consequential
damages, costs, or expenses arising out of or in connection with the performance of the
product delivered hereunder. Digi will in no case cover damages arising out of the
product being used in a negligent fashion or manner.
To Contact Digi
For prompt response when calling for service information, have the following information ready:
• Product serial number and rev.
• Date of purchase
• Vendor or place of purchase
Reach Digi Technical Support at 408/744-2751
Or E-mail at “sun-tech@dgii.com”
Address: 1299 Orleans Drive
Sunnyvale, CA 94089
Voice: 408/744-2775
Fax: 408/744-2793
E-mail: info@dgii.com
Five-Year Limited Warranty
Doc #: 90000091 Rev. A
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